Polymer materials for electrochemical applications: Processing in supercritical fluids

Kondratenko, Mikhail S.; Elmanovich, Igor V.; Gallyamov, Marat O.

doi:10.1016/j.supflu.2017.03.011

Cited by 21 publications

(8 citation statements)

References 136 publications

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“…Supercritical fluids (SCFs) are widely used in industry and research because of their unique properties (16). They are particularly useful in the synthesis of special medicines (17), polymers (18), and nanomaterials (19) that are difficult or impossible to obtain under typical conditions; they have also been investigated to prepare materials for electrochemical applications (20). To date, however, the efficacy of the superacidic PFSA ionomers as electrode binders has not been revealed.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Ahn

Kang

et al. 2020

Sci. Adv.

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In polymer electrolyte fuel cells (PEFCs), protons from the anode are transferred to the cathode through the ionomer membrane. By impregnating the ionomer into the electrodes, proton pathways are extended and high proton transfer efficiency can be achieved. Because the impregnated ionomer mechanically binds the catalysts within the electrode, the ionomer is also called a binder. To yield good electrochemical performance, the binder should be homogeneously dispersed in the electrode and maintain stable interfaces with other catalyst components and the membrane. However, conventional binder materials do not have good dispersion properties. In this study, a facile approach based on using a supercritical fluid is introduced to prepare a homogeneous nanoscale dispersion of the binder material in aqueous alcohol. The prepared binder exhibited high dispersion characteristics, crystallinity, and proton conductivity. High performance and durability were confirmed when the binder material was applied to a PEFC cathode electrode.

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Section: Introductionmentioning

confidence: 99%

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Ahn

Kang

et al. 2020

Sci. Adv.

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“…In relation to PDMS, this has not yet been studied. Nevertheless, such a well-known approach [63,64] makes it quite easy to control the degree of material porosity in the range of 30-60%, which was shown for the films of some other polymers [65].…”

Section: Pdms Role In Pore Nucleation Process During Decompressionmentioning

confidence: 99%

Organosilicone Compounds in Supercritical Carbon Dioxide

et al. 2022

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This review considers the key advantages of using supercritical carbon dioxide as a solvent for systems with organosilicon compounds. Organosilicon polymeric materials synthesis as well as the creation and modification of composites based on them are discussed. Polydimethylsiloxane and analogues used as polymerization stabilizers and nucleation promoters in pore formation processes are analyzed as well.

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“…NiCo 2 O 4 nanotubes coated with PANI nanofibers were fabricated using the electrodeposition method. , A 150 mL portion of aqueous solution containing 0.5 M aniline monomer and 1 M H 2 SO 4 was used as electrolyte. The electrodeposition process of PANI was carried out in a standard three-electrode system at a constant voltage of 1 V at room temperature for a deposition time of 3 min.…”

Section: Experimental Sectionmentioning

confidence: 99%

NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

Pan

Liu

et al. 2019

J. Phys. Chem. C

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NiCo2O4 is one of the most promising supercapacitor electrode materials. However, its capacitance and cycle stability require further improvement for practical application. Herein, a porous NiCo2O4 nanotube array@polyaniline (NiCo2O4@PANI) electrode grown directly on carbon textiles is designed and synthesized through a facile two-step method. Electrochemical tests show that the NiCo2O4@PANI/carbon textiles composite electrode exhibits a higher specific capacity (720.5 C g–1, 10.38 C cm–3 in terms of volumetric capacity) than an electrode of pure NiCo2O4 at a current density of 1 A g–1. Additionally, the PANI layer is also beneficial to prevent the deformation of the tubular NiCo2O4 and to keep 99.64% capacity retention after 10 000 cycles. The prominent electrochemical capacitive properties of the NiCo2O4@PANI electrode are not only attributed to the extra pseudo-capacitance originating from PANI but also the synergistic effects of NiCo2O4 and PANI. Detailed investigation of the electrochemical impedance spectroscopy and UV–vis–NIR spectrophotometry data reveals decreased charge transfer resistance. Further mechanism and dynamics analysis based on cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) reveals that the composite electrode shows enhanced redox and surface-capacitive behavior because of the coated PANI. This work provides an effective strategy to improve the supercapacitor performance by inducing interactions based on heterostructure, and the prepared NiCo2O4@PANI composite electrode exhibits potential applications in emerging electrochemical energy storage devices.

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Polymer materials for electrochemical applications: Processing in supercritical fluids

Cited by 21 publications

References 136 publications

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Organosilicone Compounds in Supercritical Carbon Dioxide

NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

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Polymer materials for electrochemical applications: Processing in supercritical fluids

Cited by 21 publications

References 136 publications

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Enhancement of service life of polymer electrolyte fuel cells through application of nanodispersed ionomer

Organosilicone Compounds in Supercritical Carbon Dioxide

NiCo2O4@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

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Product

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About

NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application